1a6b264b5SAlexey Samsonov //===-- lib/adddf3.c - Double-precision subtraction ---------------*- C -*-===// 2a6b264b5SAlexey Samsonov // 357b08b09SChandler Carruth // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 457b08b09SChandler Carruth // See https://llvm.org/LICENSE.txt for license information. 557b08b09SChandler Carruth // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6a6b264b5SAlexey Samsonov // 7a6b264b5SAlexey Samsonov //===----------------------------------------------------------------------===// 8a6b264b5SAlexey Samsonov // 9*33b8a553SYi Kong // This file implements double-precision soft-float subtraction. 10a6b264b5SAlexey Samsonov // 11a6b264b5SAlexey Samsonov //===----------------------------------------------------------------------===// 12a6b264b5SAlexey Samsonov 13a6b264b5SAlexey Samsonov #define DOUBLE_PRECISION 14a6b264b5SAlexey Samsonov #include "fp_lib.h" 15a6b264b5SAlexey Samsonov 16a6b264b5SAlexey Samsonov // Subtraction; flip the sign bit of b and add. __subdf3(fp_t a,fp_t b)17082b89b2SPetr HosekCOMPILER_RT_ABI fp_t __subdf3(fp_t a, fp_t b) { 18a6b264b5SAlexey Samsonov return __adddf3(a, fromRep(toRep(b) ^ signBit)); 19a6b264b5SAlexey Samsonov } 20a6b264b5SAlexey Samsonov 2136ac5ddfSSaleem Abdulrasool #if defined(__ARM_EABI__) 220d586d06SEli Friedman #if defined(COMPILER_RT_ARMHF_TARGET) __aeabi_dsub(fp_t a,fp_t b)23082b89b2SPetr HosekAEABI_RTABI fp_t __aeabi_dsub(fp_t a, fp_t b) { return __subdf3(a, b); } 240d586d06SEli Friedman #else 2584da0e1bSPetr Hosek COMPILER_RT_ALIAS(__subdf3, __aeabi_dsub) 2636ac5ddfSSaleem Abdulrasool #endif 270d586d06SEli Friedman #endif 28